From 653f2b28125e26671c37ee79fee9d86b6516b104 Mon Sep 17 00:00:00 2001
From: mirza-samad-ahmed-baig <mirzasamadahmedbaig@gmail.com>
Date: Wed, 9 Jul 2025 15:51:48 +0500
Subject: [PATCH] Fix: Prevent potential buffer overflow in
 CompressionUtil.swift

---
 bitchat/Utils/CompressionUtil.swift | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/bitchat/Utils/CompressionUtil.swift b/bitchat/Utils/CompressionUtil.swift
index e112e977..4fabf38a 100644
--- a/bitchat/Utils/CompressionUtil.swift
+++ b/bitchat/Utils/CompressionUtil.swift
@@ -18,7 +18,8 @@ struct CompressionUtil {
         // Skip compression for small data
         guard data.count >= compressionThreshold else { return nil }
         
-        let destinationBuffer = UnsafeMutablePointer<UInt8>.allocate(capacity: data.count)
+        let maxCompressedSize = data.count + (data.count / 255) + 16
+        let destinationBuffer = UnsafeMutablePointer<UInt8>.allocate(capacity: maxCompressedSize)
         defer { destinationBuffer.deallocate() }
         
         let compressedSize = data.withUnsafeBytes { sourceBuffer in